[FGS]

My 110v 800w air cooled spindle will not spin. It's got less than 10hours of use. Is there a way I can bypass the VFD and power the spindle to prove that it's the spindle and not the VFD.?

[awerby]

I suppose you could borrow someone else's VFD, but no; you need an inverter to provide the 3-phase power the spindle actually runs on.

[FGS]

Thanks, Kinda thought so. I was always going to upgrade to water cooled and I guess the time is now. Just hope it's the spindle. Unless there's a way to check out the VFD.

[FGS]

Thanks, Kinda thought so. I was always going to upgrade to water cooled and I guess the time is now. Just hope it's the spindle. Unless there's a way to check out the VFD.

I did a continuity check and that was fine and eliminates the wires.

[FGS]

It's working. I reset the VFD PD013 = 8. Then reprogrammed the VFD. plugged it in and it works. The only explanation I can think of that there must have been a surge or something that screwed up the settings. It had been working for almost a year without incident.

[mactec54]

It's working. I reset the VFD PD013 = 8. Then reprogrammed the VFD. plugged it in and it works. The only explanation I can think of that there must have been a surge or something that screwed up the settings. It had been working for almost a year without incident.

When you said you plugged it in, plugging and unplugging could cause this problem if that is how you are using it, VFD Drives don't like to be unplugged to disconnect the power, and should never be used this way

[ger21]

Does the VFD display appear to be working?

Unplug the spindle, and check the resistance of the 3 wires to each other. You should get 3 identical readings.

[handlewanker]

In other words, you power the spindle down to zero with the VFD and then it can be switched off?

As the man, said it would not be practical to leave a VFD plugged in to a mains supply unattended for any length of time as the mains can drop out any time even for a brief instant and that is a switch off/unplugging by anyone's interpretation.

Thanks to Mac for the tip......I'm sure not many people, if any, switch a VFD off at the power point while it is in the running position...…….I would think that if the motor was turning when the VFD was unplugged the back EMF would do some mischief to the VFD......would a set of diodes on the output lines cure that problem?

What happens if, during a run cycle, a breaker trips or you get a complete loss of power etc...…...like they do frequently in South Africa.....total blackout for hours at a time...….I would think that in that case a UPS would be highly recommended.

Down here in OZ we have an earth leakage device on the mains power board that detects a leakage to earth, or your body if you contact the main wiring etc, and will immediately switch the power off before you can get zapped to bits......it acts if it detects even a few milliamps of an earth leakage.
Ian.

[mactec54]

In other words, you power the spindle down to zero with the VFD and then it can be switched off?

As the man, said it would not be practical to leave a VFD plugged in to a mains supply unattended for any length of time as the mains can drop out any time even for a brief instant and that is a switch off/unplugging by anyone's interpretation.

Thanks to Mac for the tip......I'm sure not many people, if any, switch a VFD off at the power point while it is in the running position...…….I would think that if the motor was turning when the VFD was unplugged the back EMF would do some mischief to the VFD......would a set of diodes on the output lines cure that problem?

What happens if, during a run cycle, a breaker trips or you get a complete loss of power etc...…...like they do frequently in South Africa.....total blackout for hours at a time...….I would think that in that case a UPS would be highly recommended.

Down here in OZ we have an earth leakage device on the mains power board that detects a leakage to earth, or your body if you contact the main wiring etc, and will immediately switch the power off before you can get zapped to bits......it acts if it detects even a few milliamps of an earth leakage.
Ian.

Quality VFD Drives can handle those kind of problems, ( like Power Loss ) but the cheaper VFD Drive can not and most will fail when this happens


This is what a EStop did to one spindle from 24,000

[handlewanker]

I was under the impression that the Estop button cut all power to the machine.....how can a spindle winding be burnt out with no power present......looks like a water pump failure.
Ian.

[wmgeorge]

A lot of the Chinese drives are not built to a decent standard and will fail for just about any reason.